.replace function now working as intented (python)

I need my program to replace a certain "-" with a variable. I’ve tried this but it replaces the whole thing with the varibale.

jelenleg = 8 * "-"
x = 0
guess = c
jelenleg = jelenleg[x].replace("-", guess)
print(jelenleg)

So I need this to happen:
before: ——–
after: c——-
But instead what I get is this: c

>Solution :

You can specify the count of to be replaced items:

jelenleg.replace("-", guess, 1)

will only replace one -

To replace at a particular location, I cant think of anything easier than transforming the string into a list, then replacing, then back to a string, like this:

jelenleg_list = list(jelenleg)
jelenleg_list[x] = guess
jelenleg = "".join(jelenleg_list)